Wiper Blade Fastening Mechanism for Curved Windshield Contact
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Solution Overview
Problem
Windshield wiper devices often lose contact with curved windshields during intense temperature fluctuations and varying rain or snow conditions, leading to non-wiped areas and smearing, and existing solutions fail to reliably prevent smearing across multiple parameters.
Innovation Solution
A window wiper device with a flexible upper and lower part connected by spaced-out elements, allowing relative movement, and a wiper-blade-side fastening part that connects to a fastening element via a linear movement, enabling a one-click mounting and dismounting system with defined rotational position, and optional features like a spring for force adaptation and guide elements for precise contact pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiper blade pressure on the windshield is increased to improve wiping reliability, then the wiping effectiveness improves, but the risk of smearing increases and the handling complexity increases
Solution Approach 1:
The patent implements a dynamic fastening system where the wiper blade can rotate relative to the drive shaft through a defined angle range, allowing the contact pressure to be dynamically adjusted based on windshield curvature and operating conditions. This dynamic adjustment capability enables reliable wiping without excessive pressure that causes smearing.
Solution Approach 2:
The patent changes the rotational parameter of the wiper blade relative to the drive shaft. By allowing rotation within a defined angle range and using a support bearing with a further contact point to define rotational position, the system can optimize contact pressure parameters for different wiping conditions, preventing both loss of contact and smearing.
2Reliability
If a complex fastening system is used to ensure reliable wiping contact, then the wiping reliability improves, but the mounting and dismounting complexity increases
Solution Approach 1:
The patent segments the fastening system into a drive shaft with fastening element and a wiper blade with fastening part, allowing independent assembly and disassembly. The linear movement connection enables the fastening part to be pushed onto the fastening element for mounting and pulled off for dismounting, simplifying user operation while maintaining reliable wiping contact through the defined rotational positioning mechanism.
3Manufacturing precision
If the wiper blade structure is made rigid to maintain consistent contact pressure, then the wiping consistency improves, but the adaptability to curved windshields and temperature fluctuations worsens
Solution Approach 1:
The patent introduces rotational dynamics to the wiper blade structure, allowing it to rotate within a defined angle range relative to the drive shaft. This dynamic capability enables the rigid blade structure to adapt to curved windshields and temperature-induced dimensional changes while the support bearing and contact point mechanism maintains consistent contact pressure through defined rotational positioning.
Data Source
AI summary
The invention relates to a window-wiping device for a vehicle having a fastening element fastened to a drive shaft, in particular a motor vehicle. The window-wiping device comprises a wiper blade having an elongate upper part, which is at least partially flexible, an elongate lower part, which is at least partially flexible, a plurality of connecting elements for connecting the upper part and the lower part, wherein the connecting elements are spaced apart from each other along a longitudinal extent of the wiper blade, and wherein the connecting elements are designed to enable a motion of the upper part and of the lower part in relation to each other with a motion component along a longitudinal extent of the wiper blade, and a wiper-blade-side fastening part, wherein the wiper-blade-side fastening part can be detachably connected by means of a linear motion on the fastening element, and the wiper-blade-side fastening part can be connected to the fastening element in such a way that a rotational position about an axis perpendicular to the longitudinal extent of the wiper blade and perpendicular to the linear motion is defined by a support and a further contact point.